Unwiredview published the purported image of its flagship handset, claiming to have received it from a "trusted source".
Tipped for a formal unveiling at the Mobile World Conference next month, the HTC M7 is expected to feature a 1.7GHz quad-core processor and a 4.7-inch Full HD display.
Other rumoured hardware specs include 32GB of on-board storage, 2GB of RAM, a 13-megapixel rear-facing camera and LTE connectivity.
The M7 will also feature an IR port at the top, adjacent to the power button, sparking rumours it will include universe remote control capabilities out of the box.
HTC is expected to unveil the handset at MWC 2013, which takes place between February 25 and 28.